文献类型：期刊文献

英文题名：Collapse Mechanism of Shallow-Buried Karst Cave Under the Effect of Mining

作者：Zhou, Z. Xu, Y. L. Zhu, C. Q. Xu, M. T. Jin, Z. Y.

第一作者：Zhou, Z.

通信作者：Zhou, Z[1]

机构：[1]Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China;[2]Hunan Univ Sci & Technol, Sch Resource Environm & Safety Engn, Xiangtan 411201, Peoples R China

第一机构：贵州理工学院矿业工程学院

通信机构：corresponding author), Guizhou Inst Technol, Inst Min Engn, Guiyang 550003, Peoples R China.|贵州理工学院矿业工程学院;贵州理工学院;

年份：2021

卷号：39

期号：2

起止页码：1521-1532

外文期刊名：GEOTECHNICAL AND GEOLOGICAL ENGINEERING

收录：EI(收录号：20204009290977);Scopus(收录号：2-s2.0-85091730387);WOS:【ESCI(收录号:WOS:000574063500003)】；

基金：This work was financially support by the Guizhou institute of technology academic seedling cultivation and innovation project (???????[2017],5789-14), National Natural Science Foundation of China (51874109, 51764010) and Projects supported by Guizhou Province Outstanding Young Science and Technology Personnel Training Program (???????[2019]5674), which are gratefull acknowledge.

语种：英文

外文关键词：Karst collapse; Earth fissures; Soil cave; Effect of mining

摘要：Considering the surface collapse problem in shallow-buried karst mining area, the process and mechanism of karst cave and surface collapse were theoretically analyzed. The surface collapse process of shallow-buried karst was reconstructed through UDEC numerical simulation, and the causes for the development of open karst cave fissures were preliminarily discussed. Study results indicate that: the formation of open karst cave fissures is the prerequisite and basis for surface collapse, and whether the structure of the soil cave may remain stable is the key for whether the karst collapse will develop to surface. In response to this, in order to prevent surface collapse after the formation of open karst cave fissures, the overlying layer must be thicker than the sum of ultimate equilibrium height of the soil cave and the ultimate development depth of the earth fissures. Meanwhile, the formation of open karst cave fissures is mainly due to the reduction or unloading of horizontal pressure stress during the bending and subsidence process of the karst stratum. Based on the research achievements in this paper, cases of karst and surface collapse in the mining area were analyzed and discussed with Pinghu Mine as the engineering background, and the results indicate that the critical safety thickness of the overlying layer at No.1 and No.6 collapse sites in Pinghu Mining area should be at least 13.36 m. In this paper, from the point view of environmental protection, the development process and mechanism of shallow-buried karst collapse under the effect of mining were analyzed to provide directive significance for mining with coordination between environment and resources in karst areas.